Tritium (known as hydrogen-3) is a radioactive isotope of hydrogen. Naturally occurring tritium is extremely rare on earth. This watch equips the tritium made in mb-microtec in switzerland which has advanced technology for tritium. This self-powered lighting is much brighter than ever before (normal luminous lighting).

Of course, this watch meets t25(japanese safety standard). It is great useful for outdoor activity or sport at night. [specifications] -quartz (japanese movement) -swiss tritium on 12 indexes, minute hand, and hour hand.